http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47258
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-12-15
02:03:43 UTC ---
Can you try this patch:
Index: tree-outof-ssa.c
===================================================================
--- tree-outof-ssa.c (revision 67191)
+++ tree-outof-ssa.c (revision 67192)
@@ -1021,6 +1021,9 @@ insert_backedge_copies (void)
basic_block bb;
gimple_stmt_iterator gsi;
+ /* Make sure that edges have updated to be marked for back edges. */
+ mark_dfs_back_edges ();
+
FOR_EACH_BB (bb)
{
/* Mark block as possibly needing calculation of UIDs. */
--- CUT ---
I did not create this patch, it came from
http://gcc.gnu.org/ml/gcc-patches/2011-11/msg01865.html .
Which means this is most likely fixed on the trunk already.
